Dec 19 16:42:16.033 INFO checking gannonchan/var_study against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 16:42:16.033 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-7/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/gannonchan/var_study:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 16:42:16.657 INFO [stdout] cc1e6b7f3ef73e28bdf85a00d964798a9a0c5e409828c0ffe4fe15dedb26a0a2
Dec 19 16:42:16.662 INFO running `"docker" "start" "-a" "cc1e6b7f3ef73e28bdf85a00d964798a9a0c5e409828c0ffe4fe15dedb26a0a2"`
Dec 19 16:42:18.100 INFO [stderr]     Checking var_study v0.1.0 (/opt/crater/workdir)
Dec 19 16:42:18.536 INFO [stderr] warning: unused variable: `first_name`
Dec 19 16:42:18.536 INFO [stderr]   --> src/main.rs:23:9
Dec 19 16:42:18.536 INFO [stderr]    |
Dec 19 16:42:18.536 INFO [stderr] 23 |     let first_name = String::from("0");
Dec 19 16:42:18.536 INFO [stderr]    |         ^^^^^^^^^^ help: consider using `_first_name` instead
Dec 19 16:42:18.536 INFO [stderr]    |
Dec 19 16:42:18.536 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 16:42:18.536 INFO [stderr] 
Dec 19 16:42:18.536 INFO [stderr] warning: unused variable: `last_name`
Dec 19 16:42:18.536 INFO [stderr]   --> src/main.rs:24:9
Dec 19 16:42:18.536 INFO [stderr]    |
Dec 19 16:42:18.536 INFO [stderr] 24 |     let last_name = String::from("张三");
Dec 19 16:42:18.536 INFO [stderr]    |         ^^^^^^^^^ help: consider using `_last_name` instead
Dec 19 16:42:18.536 INFO [stderr] 
Dec 19 16:42:18.536 INFO [stderr] warning: unused variable: `f`
Dec 19 16:42:18.536 INFO [stderr]   --> src/main.rs:73:9
Dec 19 16:42:18.536 INFO [stderr]    |
Dec 19 16:42:18.536 INFO [stderr] 73 |     let f = match f {   //使用match判断打开文件是否出现错误
Dec 19 16:42:18.536 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 19 16:42:18.536 INFO [stderr] 
Dec 19 16:42:18.536 INFO [stderr] warning: unused variable: `f`
Dec 19 16:42:18.536 INFO [stderr]   --> src/main.rs:95:9
Dec 19 16:42:18.536 INFO [stderr]    |
Dec 19 16:42:18.536 INFO [stderr] 95 |     let f = File::open("d:\\hello.txt").unwrap();
Dec 19 16:42:18.536 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 19 16:42:18.536 INFO [stderr] 
Dec 19 16:42:18.536 INFO [stderr] warning: unused variable: `f`
Dec 19 16:42:18.537 INFO [stderr]   --> src/main.rs:97:9
Dec 19 16:42:18.537 INFO [stderr]    |
Dec 19 16:42:18.537 INFO [stderr] 97 |     let f = File::open("d:\\hello.txt").expect("打开文件发生错误！");
Dec 19 16:42:18.537 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 19 16:42:18.537 INFO [stderr] 
Dec 19 16:42:18.544 INFO [stderr] warning: unused variable: `first_name`
Dec 19 16:42:18.544 INFO [stderr]   --> src/main.rs:23:9
Dec 19 16:42:18.544 INFO [stderr]    |
Dec 19 16:42:18.544 INFO [stderr] 23 |     let first_name = String::from("0");
Dec 19 16:42:18.544 INFO [stderr]    |         ^^^^^^^^^^ help: consider using `_first_name` instead
Dec 19 16:42:18.544 INFO [stderr]    |
Dec 19 16:42:18.544 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 16:42:18.544 INFO [stderr] 
Dec 19 16:42:18.544 INFO [stderr] warning: unused variable: `last_name`
Dec 19 16:42:18.544 INFO [stderr]   --> src/main.rs:24:9
Dec 19 16:42:18.544 INFO [stderr]    |
Dec 19 16:42:18.544 INFO [stderr] 24 |     let last_name = String::from("张三");
Dec 19 16:42:18.544 INFO [stderr]    |         ^^^^^^^^^ help: consider using `_last_name` instead
Dec 19 16:42:18.544 INFO [stderr] 
Dec 19 16:42:18.544 INFO [stderr] warning: unused variable: `f`
Dec 19 16:42:18.544 INFO [stderr]   --> src/main.rs:73:9
Dec 19 16:42:18.544 INFO [stderr]    |
Dec 19 16:42:18.545 INFO [stderr] 73 |     let f = match f {   //使用match判断打开文件是否出现错误
Dec 19 16:42:18.545 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 19 16:42:18.545 INFO [stderr] 
Dec 19 16:42:18.545 INFO [stderr] warning: unused variable: `f`
Dec 19 16:42:18.545 INFO [stderr]   --> src/main.rs:95:9
Dec 19 16:42:18.545 INFO [stderr]    |
Dec 19 16:42:18.545 INFO [stderr] 95 |     let f = File::open("d:\\hello.txt").unwrap();
Dec 19 16:42:18.545 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 19 16:42:18.545 INFO [stderr] 
Dec 19 16:42:18.545 INFO [stderr] warning: unused variable: `f`
Dec 19 16:42:18.545 INFO [stderr]   --> src/main.rs:97:9
Dec 19 16:42:18.545 INFO [stderr]    |
Dec 19 16:42:18.545 INFO [stderr] 97 |     let f = File::open("d:\\hello.txt").expect("打开文件发生错误！");
Dec 19 16:42:18.545 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 19 16:42:18.545 INFO [stderr] 
Dec 19 16:42:18.648 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.59s
Dec 19 16:42:19.338 INFO running `"docker" "inspect" "cc1e6b7f3ef73e28bdf85a00d964798a9a0c5e409828c0ffe4fe15dedb26a0a2"`
Dec 19 16:42:19.716 INFO running `"docker" "rm" "-f" "cc1e6b7f3ef73e28bdf85a00d964798a9a0c5e409828c0ffe4fe15dedb26a0a2"`
Dec 19 16:42:20.181 INFO [stdout] cc1e6b7f3ef73e28bdf85a00d964798a9a0c5e409828c0ffe4fe15dedb26a0a2